建けん久きゅうけんきゅうMeanings1nounKenkyū era (1190–1199)Japanese era name (年号) corresponding to the late Heian and early Kamakura periods. Used in historical contexts.建けん久きゅう年ねん間かんに鎌かま倉くら幕ばく府ふが成せい立りつした。The Kamakura shogunate was established during the Kenkyū era.